Menachem Liss, DO

Dr. Mary O'Malley is board certified in Adult Psychiatry and Sleep Medicine. She received her medical degree from Weill Cornell Medical School and PhD in Neurobiology from The Rockefeller University. She completed her Psychiatry residency and Sleep Medicine Fellowship training at the New York University Medical Center. In her psychiatric practice, Dr. O'Malley uses an integrative approach to health, combining evidence-based concepts in neurobiology with psychological, social and spiritual/existential worldviews to understand and treat every patient. Her primary practice is medication management. She also integrates elements of psychotherapy into her work, typically within 30-minute follow-up visits. In addition to medication and psychotherapy, she incorporates wellness tools into visits, such as mindfulness exercises and sleep management strategies. If she believes that additional psychotherapy is needed, she will recommend that you add a therapist to your care team. Dr. O'Malley has extensive experience working with people from many stages of life, with diverse world views and cultural backgrounds. She has always had an inclusive practice and welcomes people who identify as LBGTQIA+. As part of her own life path she became an Interfaith Minister and enjoys including spirituality and the supportive role it can play in healing for her patients. Her primary focus is working with adults with mood and anxiety disorders, trauma symptoms, ADHD, and problems with sleep. She enjoys working with people facing life transitions, especially older adults and women who are struggling with mental health challenges related to pregnancy and post-partum health. Prior to joining Talkiatry, Dr. O'Malley was working at Hartford Healthcare with adults in intensive outpatient programs and at Hackensack Meridian Health outpatient clinics. She was the medical director of the Consultation Liaison Service at Berkshire Medical Center in Pittsfield, Massachusetts, and an assistant professor at UMass Medical School. She has published and presented widely on topics related to Wellness in Psychiatry, Ethics and Sleep Medicine. She is an advocate for finding your voice in medical decision-making and enjoys using sound healing for relaxation and stress management.

Michelle E. Vásquez has been a Licensed Professional Counselor for over 27 years. She has been specializing in grief work since 2012. Many of her clients are living with the loss of loved ones or experiencing other types of non-death loss, such as divorce, job loss, and other significant life changes. Her primary goal is to truly listen to your experience and help you work through it, creating a plan of action together. It is your therapy, and your active involvement is crucial. When dealing with grief, you may still be in pain and need to talk about it long after others want you to stop talking. This is when therapy can be helpful. Your grief journey is at your pace. Michelle uses Cognitive Behavioral Therapy and Solution-Focused Therapy, along with other approaches that help you address loss and trauma in unique ways to begin to write your healing story. She has also worked with domestic violence survivors and child abuse survivors. Michelle works with clients both in English and Spanish and has experience with immigrant populations from many countries. Michelle graduated from Our Lady of the Lake University in 1993. She is currently studying Internal Family Systems Therapy to help her provide you with new ways to address the challenges that bring you to therapy.

Brenda Keirns, LPC, NCC, is a Licensed Professional Counselor recognized by the National Board for Certified Counselors. She earned her Master’s degree in Clinical Counseling from Bellevue University and has extensive experience across inpatient, outpatient, and telehealth settings. Brenda is trained in EMDR through an EMDRIA-approved program and brings over six years of licensure experience. With a multicultural upbringing and more than 18 years as a military spouse, including Command Team involvement, she has a deep understanding of the unique challenges faced by diverse individuals and families. Brenda also serves as a Committee Member for Integratus, the academic journal of the Catholic Psychotherapy Association.

Brenda values open communication and creates a warm, non-judgmental environment where patients feel respected and supported. She tailors treatment to each patient’s unique needs and utilizes an eclectic, evidence-based approach drawing on CBT, EMDR, SFBT, REBT, DBT, attachment-based theory, trauma-informed care, and faith-based therapy rooted in Thomistic Psychology. Brenda helps patients address depression, anxiety, trauma, substance use, relational challenges, personality disorders, and life transitions.

Brenda partners with patients to develop practical coping tools while building on strengths and resilience. She emphasizes collaboration to ensure that patients actively shape their therapeutic goals. With a balance of compassion and clinical expertise, Brenda integrates evidence-based practices with individualized strategies to promote emotional well-being, personal growth, and improved daily functioning.

Brittany Stef is a Licensed Mental Health Counselor (LMHC) in New York and a National Certified Counselor (NCC). With extensive experience in education and various clinical settings, she has supported individuals and families of all ages in overcoming diverse mental health challenges, including depression, anxiety, mood disorders, self-esteem issues,   and significant life changes.

Brittany is passionate about therapy and employs empowerment-driven, holistic approaches. Her techniques include Cognitive Behavioral Therapy (CBT), Dialectical Behavioral Therapy (DBT), Motivational Interviewing, Solution-Focused Therapy, and Person-Centered Therapy.

Derek Miller is a Licensed Clinical Social Worker, who has extensive experience working in the fields of substance abuse and mental health. Derek has worked with clients with a large variety of concerns and backgrounds, with more experience with male and minority populations. Derek attended undergraduate school in Alfred, NY, graduate school in Rochester, NY, including a school-based visit to Estonia to learn about social work systems abroad. Derek's greatest passion is helping people make lasting change in their lives. His approach draws both on professional and personal experiences with addiction, trauma, first responders, relationships and more. By creating a space and relationship where you feel safe, valued, and respected, Derek works together with you to overcome the challenges of today and build resiliency for the challenges yet to come. Therapy can be a truly transformative experience, when it is built on human connection and dedication to change. Derek takes an active approach, which includes asking tough questions while staying respectful, as well as humor and friendly conversations when appropriate. Therapy begins with building trust and a good relationship. Derek utilizes experiences from various practice models, including Cognitive Processing Therapy, Solution Focused Therapy and Motivational Interviewing.

Kehinde Adelusi is a Licensed Professional Counselor (LPC) with experience in both outpatient and inpatient hospital settings, including roles as a Behavioral Health Associate and Psychotherapist at a State University Counseling Center. They earned a master’s degree in Clinical Mental Health Counseling from Albany State University and help individuals navigate anxiety, depression, PTSD, trauma, anger management, and substance use toward healing and personal growth.

Kehinde creates a warm, welcoming, and supportive environment where patients feel heard, understood, and respected. They guide patients to gain insight through friendly conversation and reflective questioning, tailoring treatment plans to each patient’s unique personality and needs.

Kehinde uses active listening, empathy, and validation to understand a patient’s history, strengths, concerns, and desired outcomes. They work collaboratively to develop individualized treatment plans that address specific goals and promote lasting growth.